/Engine/Plugins/Experimental/PCG/Source/PCG/Public/PCGGraph.h
Handle the sync between the parent parameters and the overrides. Will return true if something changed.
bool RefreshParameters ( const [FInstancedPropertyBag](API\Plugins\StructUtils\FInstancedPropertyBag) * ParentUserParameters, [EPCGGraphParameterEvent](API\Plugins\PCG\EPCGGraphParameterEvent) InChangeType, [FName](API\Runtime\Core\UObject\FName) InChangedPropertyName )